For rigid parts such as frame and end cover, as long as the form and position tolerances and dimensions meet the requirements, basically there will be no problems after the whole machine is assembled. However, for other parts, some quality problems may occur to varying degrees, such as winding damage during assembly and transportation, aluminum casting defects that may occur during aluminum casting, some non-dimensional errors during assembly, and some parts that are not assembled properly due to uneven air gap between stator and rotor after assembly.
The inspection and test items of three-phase asynchronous motor will be specified in the product technical conditions, mainly including:
1. Measure the insulation resistance of the winding to ground and phase; This project is carried out before other projects of motor test, and special attention should be paid to the matching of test instruments and rated voltage of motor.
2. Measurement of winding DC resistance; The project is carried out in the cold state of the motor. During the test, the objectivity of resistance deviation should be identified according to the ambient temperature, and special attention should be paid to the accuracy of the resistance tester and the applicability of testing the motor.
3. Measurement of open-circuit voltage of rotor of wound motor: This project mainly checks the relationship of turns ratio between rotor and stator of motor. Under the condition of accurate pressure, the test value and design value are very stable.
Hebei Youanjie Technology Co., Ltd. relies on advanced technical means and adheres to the marketing concept that high-tech products need high-quality services. The company has established a quick response after-sales service system with quick response, timely service and complete equipment, and the after-sales service network is spread all over the country.